Não informado. (1968). Journal of Approximation Theory. Academic Press.
Lua i Stíl Chicago (17ú heag.)Não informado. Journal of Approximation Theory. San Diego, Calif: Academic Press, 1968.
Lua MLA (8ú heag.)Não informado. Journal of Approximation Theory. Academic Press, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.